Just finished book 1. The ending is abrupt, resolving nothing. I suspect that E.L. James initially wrote a single, much shorter story that was then strung out into a trilogy upon acquisition by an actual publishing house. God forbid we ever have a single novel that tells a complete story. Everything comes in threes these days. It's an extremely irritating privileging of capitalism over story.
And now to rustle up books 2 and 3…
EDIT: Awesome! They're coming [hur hur hur] on Saturday. I should donate them to the local library when I'm done.